Ernest e



(No Model.) E. R. ESM-OND.

. ELECTRIC MOTOR. No. 505,390. Patented Sept. 19, 1893.

UNITED STATES PATENT OFEioE.

ERNEST It. ESMOND, OE NEWV YORK, N. Y.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 505,396, datedSeptember 19,1893.

Application filed August 15, 1893- Serial No. 483,177. (No model.)

To all whom it may concern.-

Be it known that I, ERNEST R. ESMOND, of the city, county, and State ofNew York,have invented certain new and useful Improvements in ElectricMotors, of which the following is a specification.

The electric motor in which my invention is comprised is one in whichboth the field and armature are rotatable, and are combined with anintermediate pinion by which they are geared together.

My invention consists in making this intermediate capable of bodilyswinging movement, to which end I mount it on a carrier which is pivotedto allow the necessary swinging movement to theintermediate. The carrieris preferably spring or equivalently controlled, so that a yieldingresistance may be offered to the movement of the intermediate from itsnormal position. A motor of this kind has a wide range of use. Whenemployed as a car motor, the pendulous intermediate can be made to actas a brake; and when used for elevating or hoisting purposes it willactas a governor to preserve uniform rate of speed under varying loads,and also to prevent abrupt starting and stopping of the hoistingapparatus.

In another application for Letters Patent, filed by me February 21,1893, Serial N 0. 463,239, I have described and claimed an elevating andhoisting apparatus of this character in which the field of the motorforms the hoisting drum; and this feature is not here claimed by me.

To enable others skilled in the art to understand and use my invention,I will now proceed to describe more particularly the manner in which itis or may be carried into eifect by reference to the accompanyingdrawings in which Figure 1 is an end elevation of the motor. Fig. 2 is asectional side elevation of the same.

In Fig. 1, part of the supporting frame is broken away, in order todisclose more clearly the arrangement of the gearing.

A is the rotating field, and B is the rotating armature of an electricmotor, of any approved or suitable type.

I have not deemed it necessary to illustrate the electrical connectionsand details, inasmuch as these form no part of my invention.

0 is the intermediate pinion, journaled in a vibratory carrier D, whichis hung on the armature shaft. In this illustration of my inventionthere are two pinions, one at each end of the carrier; but this is onlyto better balance the carrier. The pinion gears on the one hand with apinion b on the armature shaft, and on the other hand with an internalspur wheel a on the field. The carrier may be a simple pendulous arm,which can be controlled either by a spring, or by a weight. Thecontrolling device shown n the drawings, consists of a rod 0 curved inthe arc of a circle struck from the axis of movement of the carrier ascenter, and secured at its end to opposite ends of the carrier D, withwhich latter it will consequently move. The rod extends through to anintermediate stationary bearing standard d attached to the frame of themachine; and encircling the rod are two spiral springs e, 6', one oneach side of the central standard (1, confined between the standard, andthe ends of the carrier. These springs bear in opposite directions uponthe carrier and hold it in its normal position.

Having described my invention, what I claim, and desire to secure byLetters Patent,

1. An electric motor comprising a field and armature, both of themrotatable, in combination with intermediate gearing connecting the two,and a carrier for saidgearing hung upon an axis on which it can Vibrateto permit swinging movement of the gearing carried by it, substantiallyas and for the purposes hereinbefore set forth.

2. The intermediate and its pendulous spring or weight controlledcarrier, in combination with the rotatable field and rotatable armatureof an electric motor, substantially as and for the purposes hereinbeforeset forth.

3. The combination, in an electric motor having a rotatable field androtatable armature, with the internal spur wheel a and the pinion b ofan intermediate 0 meshing with signed my name in the presence of twosnbsaid Wheel and pinion, and a carrier for said scribing Witnesses.intermediate pivoted to move upon an axis coincident with that of thewheel and pinion 5 between which the intermediate is placed, asWitnesses:

set forth. H. G. VAN VECHLEN,

In testimony whereof I have hereunto JAMES F. GRANT.

ERNEST R. ESMOND.

